A graph-theory approach to optimisation of an acoustic absorber targeting a specific noise spectrum that approaches the causal optimum minimum depth

The reaction mechanism of the cationic rhodium(i)–BINAP complex catalysed isomerisation of allylic amines was explored using the artificial force induced reaction method with the global reaction route mapping strategy.

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Conserving woodland caribou habitat while maintaining timber yield: a graph theory approach

Canadian Journal of Forest Research ◽

10.1139/cjfr-2015-0431 ◽

2016 ◽

Vol 46 (7) ◽

pp. 914-923 ◽

Cited By ~ 5

Author(s):

Jonathan L.W. Ruppert ◽

Marie-Josée Fortin ◽

Eldon A. Gunn ◽

David L. Martell

Keyword(s):

Graph Theory ◽

Rangifer Tarandus ◽

High Volume ◽

Timber Harvesting ◽

Optimization Approach ◽

Theory Approach ◽

Heuristic Procedure ◽

Woodland Caribou ◽

Old Growth ◽

Old Growth Forest

The fragmentation and loss of old-growth forest has led to the decline of many forest-dwelling species that depend on old-growth forest as habitat. Emblematic of this issue in many areas of the managed boreal forest in Canada is the threatened woodland caribou (Rangifer tarandus caribou (Gmelin, 1788)). We develop a methodology to help determine when and how timber can be harvested to best satisfy both industrial timber supply and woodland caribou habitat requirements. To start, we use least-cost paths based on graph theory to determine the configuration of woodland caribou preferred habitat patches. We then developed a heuristic procedure to schedule timber harvesting based on a trade-off between merchantable wood volume and the remaining amount of habitat and its connectivity during a planning cycle. Our heuristic can attain 84% of the potential woodland caribou habitat that would be available in the absence of harvesting at the end of a 100 year planning horizon. Interestingly, this is more than that which is attained by the current plan (50%) and a harvesting plan that targets high volume stands (32%). Our results indicate that our heuristic procedure (i.e., an ecologically tuned optimization approach) may better direct industrial activities to improve old-growth habitat while maintaining specified timber production levels.

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A graph theory approach for designing conservation reserve networks with minimal fragmentation

Networks ◽

10.1002/net.20211 ◽

2007 ◽

Vol 51 (2) ◽

pp. 142-152 ◽

Cited By ~ 30

Author(s):

Hayri Önal ◽

Yicheng Wang

Keyword(s):

Graph Theory ◽

Theory Approach ◽

Reserve Networks

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Modelling spatial distributions of alpine vegetation: A graph theory approach to delineate ecologically-consistent species assemblages

Ecological Informatics ◽

10.1016/j.ecoinf.2015.09.005 ◽

2015 ◽

Vol 30 ◽

pp. 196-202 ◽

Cited By ~ 10

Author(s):

A. Mikolajczak ◽

D. Maréchal ◽

T. Sanz ◽

M. Isenmann ◽

V. Thierion ◽

...

Keyword(s):

Graph Theory ◽

Species Assemblages ◽

Spatial Distributions ◽

Theory Approach ◽

Alpine Vegetation

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A graph theory approach to predicting unfolding pathways of proteins

Journal of Molecular Graphics and Modelling ◽

10.1016/s1093-3263(00)80123-0 ◽

2000 ◽

Vol 18 (4-5) ◽

pp. 553

Author(s):

Leslie A. Kuhn ◽

Brandon Hespenheide ◽

Andrew J. Rader ◽

M.F. Thorpe

Keyword(s):

Graph Theory ◽

Theory Approach

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Graph theory approach

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19832097 ◽

1983 ◽

Vol 48 (8) ◽

pp. 2097-2117 ◽

Cited By ~ 13

Author(s):

Vladimír Kvasnička

Keyword(s):

Organic Chemistry ◽

Computer Simulation ◽

Graph Theory ◽

Chemical Reaction ◽

Molecular System ◽

Theory Approach ◽

Molecular Systems

A graph-theory formalism of the organic chemistry is suggested. The molecular system is considered as a multigraph with loops, the vertices are evaluated by their mapping onto the vocabulary of vertex labels (e.g. atomic symbols). A multiedge of multiplicity t corresponds to a t-tuple (single, double, triple, etc) bond. The chemical reaction of molecular systems is treated by the transformation of graphs. The suggested graph-theory approach allows to formalize many notions and concepts that are naturally emerging in the computer simulation of organic chemistry.

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Ransomware Behavior Attack Construction via Graph Theory Approach

International Journal of Advanced Computer Science and Applications ◽

10.14569/ijacsa.2020.0110262 ◽

2020 ◽

Vol 11 (2) ◽

Author(s):

Muhammad Safwan Rosli ◽

Raihana Syahirah ◽

Warusia Yassin ◽

Faizal M.A ◽

Wan Nur

Keyword(s):

Graph Theory ◽

Theory Approach

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CHAOTIC GRAPH THEORY APPROACH FOR IDENTIFICATION OF CONVECTIVE AVAILABLE POTENTIAL ENERGY (CAPE) PATTERNS REQUIRED FOR THE GENESIS OF SEVERE THUNDERSTORMS

Advances in Complex Systems ◽

10.1142/s0219525907001215 ◽

2007 ◽

Vol 10 (03) ◽

pp. 413-422 ◽

Cited By ~ 8

Author(s):

SUTAPA CHAUDHURI

Keyword(s):

Graph Theory ◽

Potential Energy ◽

Deep Convection ◽

Convective Available Potential Energy ◽

Pressure Level ◽

Theory Approach ◽

Severe Thunderstorm ◽

Available Potential Energy ◽

Severe Thunderstorms ◽

Conditional Instability

Severe thunderstorms are a manifestation of deep convection. Conditional instability is known to be the mechanism by which thunderstorms are formed. The energy that drives conditional instability is convective available potential energy (CAPE), which is computed with radio sonde data at each pressure level. The purpose of the present paper is to identify the pattern or shape of CAPE required for the genesis of severe thunderstorms over Kolkata (22°32′N, 88°20′E) confined within the northeastern part (20°N to 24°N latitude, 85°E to 93°E longitude) of India. The method of chaotic graph theory is adopted for this purpose. Chaotic graphs of pressure levels and CAPE are formed for thunderstorm and non-thunderstorm days. Ranks of the adjacency matrices constituted with the union of chaotic graphs of pressure levels and CAPE are computed for thunderstorm and non-thunderstorm days. The results reveal that the rank of the adjacency matrix is maximum for non-thunderstorm days and a column with all zeros occurs very quickly on severe thunderstorms days. This indicates that CAPE loses connectivity with pressure levels very early on severe thunderstorm days, showing that for the genesis of severe thunderstorms over Kolkata short, and therefore broad, CAPE is preferred.

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